No, if he wants to be a replacement, one has to assume he wants to be compatible and keep using the applications he currently uses. Any non-Mac system might be an "alternative" but not a "replacement".
I'm in the middle of producing a 17 song concept album. If I switch platforms, I have to completely redo all my mixes and learn a whole lot of new tooling. What's the cost of that? Dozens of hours of my time...